“…Swarm intelligence has been applied to homogeneous robotic system [ 11 , 14 ] which is simple robots. But in [ 9 , 15 , 16 ], they used a group of various types of mobile robots which is defined as heterogeneous swarm robotic system. Most of the research on swarm mobile robotic system is - focusing on communication systems among mobile robots [ 11 , 15 , 16 ] in order to share information,
- focusing on developed autonomous battery recharging [ 17 – 19 ] to have fully autonomous swarm robots without human intervention,
- focusing on developed navigation system [ 3 ] in order to run mobile robot without loss,
- focusing on developed management and optimization of energy system based on adaptation from biologically swarm behaviors [ 12 , 19 , 20 ],
- focusing on development of physical robot (small robot or macrorobot) [ 1 , 11 , 21 ] or simulated tools for swarm robotics [ 22 – 24 ].
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